613e2610f5d51ecd11ee5ff5d1ed32b331af678e4e5e64f2b2a544787a97cea7

Analysis

max time kernel
15s
max time network
16s
platform
windows7_x64
resource
win7-20241023-en
resource tags

arch:x64arch:x86image:win7-20241023-enlocale:en-usos:windows7-x64system
submitted
12-11-2024 23:39

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General

Target

Codecs/MatroskaSplitter.dll
Size

439KB
MD5

7d883aa427d88d2528e87d488ee5613c
SHA1

25b60603d697e9480fc6b2ef1a2163efb86e7a59
SHA256

3e433f7ca893aba0ac2b2ad536910d13871e34fc737d63c66695258b88b9c7a2
SHA512

7257207625180b9a2ff035b57078d75eb4dd2f10440edc98f86f8c3b9c97acef1e5c4ed90bc47a30890d488f3084c170babff3ffa751a187711632898d66a843
SSDEEP

6144:8k4FiNL6hHDhMXqqunRb8Z/Vw7BQ7qffGDrj+TBJkTOxeJXTQeDDWHAG:t4FiNWdhMXrunR4iQf+TrZeJkO0

Score

3^/10

discovery

Malware Config

Signatures

System Location Discovery: System Language Discovery 1 TTPs 1 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	regsvr32.exe

Modifies registry class 21 IoCs

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{149D2E01-C32E-4939-80F6-C07B81015A7A}\InprocServer32\ = "C:\\Users\\Admin\\AppData\\Local\\Temp\\Codecs\\MatroskaSplitter.dll"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{0A68C3B5-9164-4A54-AFAF-995B2FF0E0D4}\ = "MPC - Matroska Source"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{0A68C3B5-9164-4A54-AFAF-995B2FF0E0D4}\InprocServer32\ThreadingModel = "Both"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{083863F1-70DE-11D0-BD40-00A0C911CE86}\Instance\{149D2E01-C32E-4939-80F6-C07B81015A7A}\CLSID = "{149D2E01-C32E-4939-80F6-C07B81015A7A}"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\Media Type\{E436EB83-524F-11CE-9F53-0020AF0BA770}\{1AC0BEBD-4D2B-45AD-BCEB-F2C41C5E3788}	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\Media Type\{E436EB83-524F-11CE-9F53-0020AF0BA770}\{1AC0BEBD-4D2B-45AD-BCEB-F2C41C5E3788}\Source Filter = "{E436EBB5-524F-11CE-9F53-0020AF0BA770}"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{149D2E01-C32E-4939-80F6-C07B81015A7A}\InprocServer32\ThreadingModel = "Both"	regsvr32.exe
Set value (data)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{083863F1-70DE-11D0-BD40-00A0C911CE86}\Instance\{0A68C3B5-9164-4A54-AFAF-995B2FF0E0D4}\FilterData = 02000000000060000000000000000000	regsvr32.exe
Set value (data)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{083863F1-70DE-11D0-BD40-00A0C911CE86}\Instance\{149D2E01-C32E-4939-80F6-C07B81015A7A}\FilterData = 02000000000060000200000000000000307069330000000000000000020000000000000000000000307479330000000060000000700000003174793300000000600000008000000031706933000000000000000000000000000000000000000083eb36e44f52ce119f530020af0ba770bdbec01a2b4dad45bcebf2c41c5e378800000000000000000000000000000000	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{083863F1-70DE-11D0-BD40-00A0C911CE86}\Instance\{0A68C3B5-9164-4A54-AFAF-995B2FF0E0D4}	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{149D2E01-C32E-4939-80F6-C07B81015A7A}	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{0A68C3B5-9164-4A54-AFAF-995B2FF0E0D4}	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{0A68C3B5-9164-4A54-AFAF-995B2FF0E0D4}\InprocServer32\ = "C:\\Users\\Admin\\AppData\\Local\\Temp\\Codecs\\MatroskaSplitter.dll"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{083863F1-70DE-11D0-BD40-00A0C911CE86}\Instance\{149D2E01-C32E-4939-80F6-C07B81015A7A}	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{083863F1-70DE-11D0-BD40-00A0C911CE86}\Instance\{149D2E01-C32E-4939-80F6-C07B81015A7A}\FriendlyName = "MPC - Matroska Splitter"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{083863F1-70DE-11D0-BD40-00A0C911CE86}\Instance\{0A68C3B5-9164-4A54-AFAF-995B2FF0E0D4}\FriendlyName = "MPC - Matroska Source"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{083863F1-70DE-11D0-BD40-00A0C911CE86}\Instance\{0A68C3B5-9164-4A54-AFAF-995B2FF0E0D4}\CLSID = "{0A68C3B5-9164-4A54-AFAF-995B2FF0E0D4}"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\Media Type\{E436EB83-524F-11CE-9F53-0020AF0BA770}\{1AC0BEBD-4D2B-45AD-BCEB-F2C41C5E3788}\0 = "0,4,,1A45DFA3"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{149D2E01-C32E-4939-80F6-C07B81015A7A}\ = "MPC - Matroska Splitter"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{149D2E01-C32E-4939-80F6-C07B81015A7A}\InprocServer32	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{0A68C3B5-9164-4A54-AFAF-995B2FF0E0D4}\InprocServer32	regsvr32.exe

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 1644 wrote to memory of 2312	1644	regsvr32.exe	30
PID 1644 wrote to memory of 2312	1644	regsvr32.exe	30
PID 1644 wrote to memory of 2312	1644	regsvr32.exe	30
PID 1644 wrote to memory of 2312	1644	regsvr32.exe	30
PID 1644 wrote to memory of 2312	1644	regsvr32.exe	30
PID 1644 wrote to memory of 2312	1644	regsvr32.exe	30
PID 1644 wrote to memory of 2312	1644	regsvr32.exe	30

C:\Windows\system32\regsvr32.exe
regsvr32 /s C:\Users\Admin\AppData\Local\Temp\Codecs\MatroskaSplitter.dll
1⤵
- Suspicious use of WriteProcessMemory
PID:1644
- C:\Windows\SysWOW64\regsvr32.exe
  /s C:\Users\Admin\AppData\Local\Temp\Codecs\MatroskaSplitter.dll
  2⤵
  - System Location Discovery: System Language Discovery
  - Modifies registry class
  PID:2312

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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